to prep.对于；为了；(表示方向)到；向；(表示间接关系)给adv.（表示方向）去；（门）关上
双语例句
While returning more farmland to forests and grass,we should implement without delay the national plan for the conservation of grasslands. 加大退耕还林还草力度，抓紧实施全国草原生态保护建设规划。
De-farming and restoring forest are principal policies presently for the improving of eco-environment and the reducing of soil and water loss in the Loess Plateau. 摘要退耕还林还草是目前黄土高原整治生态环境和控制水土流失的主体政策。
